Combination bake and stacker



o. H. KN.\.RREBor-\Gl Re- 22,521 COMBINATION RAKE AND STACKER I Original Filed Jan. 15, 1942 i 4 Sheets-Sheet 1 July 25; 1944.

July 25, 1944. o. H'. KNARREBORG `(20MBINATION RAKE AND STACKER original Filed .-Jan. 15. 1942 4 shams-sheet 2 JPIY 25y 1944- Y o. Hi KNARREBol-QG `Ree. 22,521

COMBINATION BAKE AND STACKER Original-Filed Jan. 15; 1942 4 Sheets-Sheet 5 1H www Reima! July'izs, 1944 Serial No. 426,920, January 15, 1942. tion for reissue Marchi 19, 1943.

Applies- Scrlal Np.

4 cmims. (c1. 214-140) This invention relates to a combination power rake and stacker, and has for the primary object the provision of a device of this character which is in the form of an attachment and may be easily and quickly installed on a conventionally constructed tractor to obtain power and transportation therefrom and is readily adaptable to permit the operator of said tractor to utilize the device in gathering materials and conveying the latter to a selected place for stacking or dumping into a pile or into a conveyance.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which:

Figure l is a side elevation illustrating a combined power rake and stacker constructed in accordance with my invention and showing the same installed on a tractor;

Figure 2 is a rear elevation illustrating the device and the tractor Figure 3 is a front elevation illustrating the device and the tractor; y

Figure 4 is a top plan view illustrating the device and the tractor;

Figure 5 is a fragmentary sectional view illustrating the hydraulic hoist;

Figure 6 is a fragmentary diagrammatical view showing the hydraulic system; and

Figure 'i is a detail sectional view, showing a three-way control valve.

Referring in detail to the drawings, the numeral 5 indicates a tractor of a conventional construction and to adapt the present invention thereto, horizontal and vertical frames 6 and 1 are provided. The horizontal frame is arranged under the tractor between the wheels thereof and is suitably secured on the tractor so as not to have relative movement with relation to the frame of theA tractor.

The vertical 'frame 1 is mounted on the rear end of the tractor, as clearly shown in Figure 1.

Frame 1 comprises as shown two heavy uprights,

' the lower ends of which are secured to a suitable transverse horizontal member fastened to the tractor and located below the level of the top of the rear wheels ofthe tractor and preferably, as shown, at about the level of the axis of such wheels. The forward end of the horizontal frame is located` a limited distance beyond the front end of the tractor and includes a transversely arranged beam l on which is pivotallyA mounted a hydraulic hoist 3 including'acylinde'r l0 and a piston Il slidable in said cylinder' and provided with a stem l2 extending through) packing gland i3 at the upper end of the cylinder. The upper end of the stem I2 is forked'and has iournaled flexible element Il is trained. The cylinder o i the hoist is braced by rods or elementsV il ccnnected thereto and to the horizontal frame. The rods or elements will permit the cylinder to have a limited pivotal movement on the horizontal frame.

To guide the upward and downward movement of the stem of the hoist I, a brace linkil is'pivoted to the forked end of the Stem and t0 'the upper end of the vertical frame 1. One end of the flexible element I5 is connected to exlble elements I1 which are in turn connected to the forward end of the horizontal frame. The other end of the flexible element I5 is connected to a yoke I8 pivoted on the forward end of a swinging boom or fork frame I9. the rear end of the latter being pivotally mounted on the upper end of the.

vertical frame 1. Pivoted to the forwardend of the fork frame Isis a gathering fork 2l including rtines 2l tied together by a cross'member 22 and also'secured to a slotted endhead frame 23, Braces 24 connect the head frame to the cross member 22. The fork may also include side arms 25 secured to the head frame 23 and further connected thereto by braces 28.

When the fork frame i9 is in its lowermost position, the gathering fork or the tine; thereof may ride on the surface of the ground in advance of the tractor 5 for the purpose of raking or gathering hay, straw or other materialV and through the operation of the hoist the fork may be moved into an elevated carrying position, as clearly shown in Figure 1,y all of which operations are under direct 'control of the operator of the tractor.

The pivot for the fork frame Il on the vertical frame 1 is in the form of a shaft 21A journaled on the vertical frame adjacent its upper end and carried by said shaft 21 is a hydraulic ram 23 including a cylinder` 29 and a piston 3lvslidable therein and equipped with a stem 3l extending outwardly of one end of the cylinder and carrying a pulley head 32 in which are journaled pulleys 33. Flexible elements 34 are trained overl the pulleys in opposite directions and each has one end connected to the stem and on opposite sides of the stem from each other. The other ends of thereiny a pulley Il over which a` 2 the flexible elements Il are connected to the heacl frame 23 of the fork II.

Through the u se of the hydraulic ram the operator `may readily adjust the fork into dlii'erent positions, as for instance, "gathering position,

load carrying position and a dumping position. When the fork is elevated and in load carrying position and after the tractor has arrived at a desired place, the fork can betilted downwardly through the use of the ram so that the load can gravitate therefrom into a pile or stack or into a conveyance.

The purpose of pivotally mounting the cylinder of the ram is to permit the latter to readily follow the movement of the fork upwardly and downwardly. It will further be seen that b'y following the movement of the fork upwardly a more effective thrust is placed on the exible element I5 and the weight of the cylinder and' piston is moved rearwardly as the load is elevated thereby transferring a substantial amount of weight away from the front end of the tractor.

The vertical frame I may be strengthened by braces 35 extending from the upper portion of the frame to the forward end of the tractor frame. To cushion the fork frame as the latter nears its lowemost position, spring ilngers 3l are carried by the cross beam l.

A liquid reservoir I1 is mounted onthe tractor and has a pump ll connected thereto by a pipe Il, the latter being connected to the intake of said pump and the latter is mounted on the tractor and its power shaft 4l is connected to a power takeoff 4| of the tractor which is of a conventional construction including a control clutch.

The outlet of the pump has a feed pipe 4l connected thereto and to which pipes Il and are connected. The pipe l! is connected to the lower end of the cylinder of the hydraulic hoist I, which the pipe M is connected to the cylinder'ot the ram adjacent the closed end oi' said latter-named cylinder. The pipes u and Il are provided with control valves 4l and 41. The valve l1 is of the three-way type, the exhaust port thereof being connected to the reservoir 31 by a pipe Il.

A liquid return pipe 4l is connected to the cylinder of the ram and the reservoir 31, the purpose of which is to permit any iluid which passes the piston Jl of the ram to return to the reservoir.

A bleed pipe I! is connected to the pipe I4 adjacent the latters connection to the cylinder of the ram 28 and to the reservoir I'I and is provided with a control valve Il. A return pipe l! is also connected to the 'reservoir 31 and to the cylinder of the hydraulic hoist l adjacent the upper end of the latter-named cylinder, the purpose of whichlis to permit return of liquid from the ram when the piston thereof is in its uppermost position and also to bleed said cylinder of the hoist of liquid that may escape past the piston thereof and further to permit the force of the huid in the hoist cylinder from forcing the piston outwardly thereof at the upper end if circulation of the liquid is kept up for a period of time by the operation of the pump 3l, after the piston reaches its uppermost position.

To elevate the boom or fork'. the operator opens the valve 41 to permit the pump to free iluid from the reservoir into the lower end of the cylinder of the hoist l causing the piston there- To lower the fork, the valve I'I is moved into exhausting position permitting the iluid to return to the reservoir by way of the pipe 42. the fork-then lowers by gravitation.

To operate the fork into its dinerent positions as heretofore specliied. the operator can cause the piston I0 oi' said ram to assume diiferent positions through the manipulation of the valves Il and 4B with the pump 3B in operation. Also Y it will be noted that the adjusting of the boom or fork into its several positions may take place either when the hoist 9 is idle or operating to raise or lower the fork. Portions of the pipes Il, Il and lll are of ilexible. construction to permit the ram to swing freely. When the boom or fork Il has been lowered to extreme downward position 'there is suiiicient slack in the ilexible member Il to permit the tines Il to 'follow along the ground and be suldedfthereover inthe manner of' a rake to effectively rake up hay. grain and straw when the tractor is moved forwardly. In such/action the gathering fork may pivot on its pivotal connection with the forward end o! boom Il enabling an eilicient raking action to be obtained. v

When the device isnotin use on the tractor, the fork may be secured in an upwardly tilted direction so as not to engage the ground by engagins hooks 2l' with eyes 25 which permits the tractor to be driven from place to place without y the fork interfering by contacting the ground.

From the foregoing description. taken in connection with the accompanying drawings, it will be seen that a very eiilcient, durable and economically constructed combined rake and stacker has been provided which may be readily installed on all tractors of conventional construction so that the tractor can be employed to furnish movement for raking and gathering the hay or other material and as the medium oftransportation of said device and the load as well as furnishing power for the operation of the hydraulic means to bring the fork into gathering position, load-carrying position, elevated position or unloading positim. My improved construction is particularly adapted for use as a quickly installed attachment for not only tractors but other types'of traction vehicles such as trucks, motor cars and graden. The construction oi' the horizontal supporting frame I with its forward end having mounted thereon the hydraulic hoist I and the construction of the readily detachable vertical boom-supof its elevated positions, the valve I1 is closed. 1I

porting frame 1, as well as the widely spaced arms of the boom IQ, enable my device to be readily attached torall conventional types of tractors now on the market without interference with any of the parts of or equipment carried by such tractors and one model or size of my attachment may be utilized for all.

Through the use of this device on the tractor. it is possible for large areas of cut growth to be easily and quickly gathered and .carried to a desired place and stacked or piled or loaded into a conveyance.

While I have shown and described the preferred embodiment ci my invention, it will be lmderstood that minor changes in construction. combination and arrangement of parts maybe made without departing from the spirit and scope o! the invention "as claimed.

What is claimed is:

1. In a combined gatherer and loader for traction vehicles, a forward horizontal support secured to the lower portion ot the vehicle and' extending beyond the forward end thereof. a second -satan 3 horizontal support secured to the vehicle and porting frame and pivoted at its forward end to extending rearwardly beyond said vehicle, said the upper portion of said hydraulic hoist.

supports being` both disposed well below the up- 3. In a combined gatherer and stacker, a verper portion of the vehiclel wheels, an upstandlng tical frame mounted on the rear end of a tracboom support mounted on said rear support and tor and including a horizontally disposed rotatextending well above` any of the parts or other able shaft located adjacent the upper end O! the equipment mounted on said vehicle, a swinging vertical frame, a horizontal platform arranged boom pivoted at its rear end tc me upper cud i under and secured to the tractor and including of said boom support and extending forwardly a rigid cross member positioned forwardly of the beyond the from; of said vehicle, a gathering me.. front end of the tractor, a gatherer frame ardium pivotedon a horizontal axis to the forward refilled over the NWOT f01 Upward and dOWrlportion of said boom, an opstanding hydraulic Ward Swinging movement and having the rear hoist Supported from said forward support and end thereof Secured t0 Said Shaft With the OI- pivoted at its lower end thereto and connected Ward end located forwardly of the from end of ing in combination a horizontal frame adapted l oted at their rear ends to the upper end of said to said boom to swing the same upwardly and the tractor and adapted to be limited inr its downto control the downward movement and adjust ward movement by the member of said platform, ment thereof, a link pivoted at its rearward end e' gathering medium pivoted to the forward end to the upper portion of said boom support and of the gatherer frame, `a hydraulic hoist plvoted pivoted at its forward end to said hydraulic hoist to the member .of sad frame and connected to for causing said hoist to swing rearwardly as it the gatherer alpe for the upward swinging swings said boom upwardly means ccntronable thereof, a hydraulic ram secured to the shaft and from said vehicle or plvmuy adjusting and movable therewith and connected'to the gatherdumping said gathering medium, the structure ing medium for the 'pivotal adjustment thereof and relation or said mrward and rearward sup and a manually controlled power driven hydrauports said bOOm SUDDOrt and hydraulic hoist lic operating means connected to the hoist and to the ram. serving to efficiently distribute the weight of the device and the 10a d carried thereby. 4. I n a combined gatherer and stacker, a ver- 2 AS an attachment for tractors and the like A tical frame mounted on the rear end of a tractor and includingv a horizontally disposed rotatable a combined gathering and loading apparatus havshaft located adjacent the upper end of the VEP tical frame, a horizontal platform arranged unaebaiglda'gsatrgrxggorgn der and secured to the tractor and including a mg beyond the forward end of the tractor a ver rigid cross member positioned forwardly of the tical boom frame adapted to be readily 'secured front end of the tractor, a gatherer frame arat the rear end of thetractor and extending well ranged over, the tracwr t01 upward and down above my o: the s. or other equipment ward swinging movement and having thc rear end thereof secured to said shaft with they formounted o Said uuml" a' swinging boom 00m' ward end located forwardly of the front end of Prism a Ua 0f "ery Widely Md ms Pi"- rne tractor and adapted to benmited initsdown- 40 ward movement by the member of'said platform, boom frame and extending forwardly and spaced a gathering medium pivoted to the forward end OlltWldly beyond any 0f the Parts 0r other equipof the gatherer frame, a hydraulic hoist pivoted ment mounted on said tractor. a gathering metf, the member of said frame and connected to diurn pivoted to the forward ends of said boom the gatherer frame for the upward swinging arms'ona transverse horizontal axis, anllpstand- 45 thereof, a hydraulic ram secured to the shaft ing hydraulic hoist swingably mounted 0n Said and movable therewith and connected to the forward SUDIJOI and 0nneted 4at its upper end gathering medium for the pivotal adjustment to said boom to swing 'he same upwardly and t0 thereof. a manually controlled power driven hy'- control the downward movement and adiustdraulic operating means connected to the hoist ment thereof, means controllable from said tracand to the' ram, and spring fingers secured to the tor for plvotally adjusting and dumping said member of said platform for cushioning the gathgathering means, and an elongated link pivoted effing frame on nearing its lowermost position at its rear end to the upper end of said boom-sup- OTTO H. KNARREBORG. 

